Method of casting metal.



Patented Nov. 8, 1910.

m n MM Mm 0 m an i/ A J WITNESSES )w-fl 1 the air and gases to ex factthat the volume remove the rough exterior surfaces thereof,

PAaiEN'r orrron.

CHARLES H. UPSON, OF WATERIBUBY, CONNECTICUT} mn'rnon or oas'rnm METAL.I

Application filed April 28, 1908, Serial No. 429,751. Renewed April 9,1910.

To all whom it may concern:

Be it known that I, CHARLES H. UPSON, a citizen of the United States,and a resident of lvaterbury, in the county of New Haven and State ofConnecticut, have made and invented certain new and useful Improvementsin Methods of Casting Metal, of which the following is a specification.

My invention relates to an improved method of pouring, casting ormolding bars, ingots, or articles of brass and other metals.

The method now in common use is to utilize or employ a sectional mold,the sections being held together in their proper relative positions bymeans of metal bands or rings surrounding the same, and wedges locatedbetween said bands and molds, or by means of bolts, the to of the moldbeing open to allow the meta to be poured into the same, the bottom ofthe inold containing a remov able plug to permit the bar or casting tobe removed after the metal has properly 'set orcooled, the molds beingfirst thoroughly oiled, and set or placed in an upright position. Incasting the ingots or bars in these molds, the heat of the molten metalcauses and, and in so doing, most of such air an gas will escape out andthrough the molten metal and top of the mold. Frequently, however, apart'of such will remain in the metal, due to the thereof is so smallthat it is insuflicient to force a passage through the metal, thepocketed or confined air and gas causing the formation of in holes inthe metal, and necessitating in al instances, the overhauling of thebars or castings in machines provided with scrapers or nives, to

im order to determine the imperfect bars.

I have found by experiment that increas. ing the volume or sup illy ofair to the molten perfect and the overcomes a f the formation ofSpecification of Letters Patent.

.- as instead of metal while pouring t e same into the mold,

1 danger 0 these pin holes, the air being supplied under Patented Nov.8, 1910.

Serial No. 554,529.

pressure from "any suitable source, the increased'volume thereofrendering it capable of forcing its way out through the soft 'metal, andresulting in a solid, smooth and homogeneous casting.

This process, it will of "course be understood, isnot in any way limitedto any peculiar type or shape of mold, it being applicable to any andall the diiferent forms invention to the to be supplied, to force acurrent thereof; nor do I limit my quantity or volume of air it beingsimply necessary thereof from the top of the mold to the bottal ormixture tom during the time the m is being poured, thereby su plying asuiticient volume to permit of its escape and the escape of the gaseswhich would otherwise be confined in the metal.

For the sake of illustration, Ihave shown in the accompanying drawing anordinary form of mold wherein- Fig. I is a perspective view of the,same, and Fig. II a vertical sectional view.

As before stated, this mold consists of the two sections A-B heldtogether in their proper relative positions by means of the ,metal bandsor straps C, the latter being tightened by means of the wedges D, thetop 0 i said .mold being open and the bottom thereof closed. Over theopen top of the mold is located the pipe E connected with any suitablesource of' air under pressure, that portion of the pipe extending overand above the mold being perforated in order to 8 deliver the air intothe moldas the metal is poured therein.

I am aware that others have attempted to effect the same result by theuse of (lo-oxidizing gases as for instance, by injecting into the moldordinary illuminating gas, such freeing the mold and metal of the oxygentherein. Such'methods, however, are quite the reverse of the onehereinabove described,

is my aim and purpose to supply this gas thereto in order that there maybe a sufficient freeing the metal of oxygen, it 9 quantity of oxygen, orair containing the oxygen, to unite with the gas or gases alreadypresent to render them inflammable.

,- Having fully described my invention, what 5 I claim as new, anddesire to secure by Letters Patent, is

1. The method hereinbefore described of castingmetal, consisting in sunlying air under pressure to the metal whi e pouring.

10 the same.

2. The method hereinbefore described of casting metal, consisting inforcin air under i pressure into a mold simultaneous y with'the pouringof the molten metal therein.

Signed at Water-ville, borough. of Water- 15 bug, in the county of NewHaven and State of onnecticut, th s 25th day of April, A. D.

CHARLES H, UPSON. Witnesses i ,H. L. Ema,

E. A. Fimncn.

